How to remove vocal of a movie with dual language track

Audacity 3 Help Forum Windows
1

Hi everyone, i’m using Audacity 2.1.0 and i would like to remove all the voice (the dubbing) from a movie to make an “homemade” dub, i wonder if it would be possible to use two different languages track (Japanese & English) to keep only the “same frequency” of both track, so it would remove what’s different which is the dubbing.

2

Assuming the two music tracks were identical between the two dubs (not guaranteed) then we stand ready to cancel the music leaving the voices, both in the same track. That’s not useful and it doesn’t work upside down.

If you have 5.1 surround mixes of the shows (one of the DVD options), the dialog is almost always in the middle (Center track) and you can create a new middle. That does work if you can decode the 5.1 into 6 individual tracks.

Koz

3

Or, if you have a stereo (2-channel) track, you can try the Vocal Removal effect. That will remove everything in the “phantom center” (everything that’s identical in both channels and in-phase). That will probably remove most of the dialog (maybe all of the dialog), but it will remove some other sounds too.

i wonder if it would be possible to use two different languages track (Japanese & English) to keep only the “same frequency” of both track, so it would remove what’s different which is the dubbing.

No… Mathematically, you’ve got two equations and 3 variables so there’s no solution.

Track 1 = Language 1 + Sound Effects
Track 2 = Language 2 + Sound Effects

There’s no way to add or subtract those two equations/expressions to get Sound Effects only.

If the sound effects are digitally identical, it is possible to subtract one track from the other to get both dialogs mixed together with no sound effects. …Not very useful. :smiley: :smiley: :smiley: (One of the languages would be inverted, but that will have no effect on the sound.) And, don’t start thinking there’s a way to add or subtract that 2-dialog, no-effects, track to get effects-only. There is not.

4

Someone on the forum tried a while back. “What happens if I invert the second track and add it to the composite…?”

No luck. As above there are too many variables.

Koz

5

Thanks a lot for all your answers, unfortunatly there is no 5.1 on the original DVD, but while looking for this information on google, I found an amator project that rebuild the entire movie audio in 5.1 https://www.youtube.com/watch?v=MhudAZhdvOg. Ho lucky I am :laughing: